Joint permitting of independent rotation of the two parts.



No. 638.564. Patented Dec. 5, I899. J. R. DAVIES. JOINT PERMITTING 0FINDEPENDENT-ROTATION OF THE TWO PARTS.

(Application filed .m 1, 1899.)

(No Model.)

Unrrnn STATES PATENT Grinch.

JAMES RICHARD DAVIES, OF LUTON, ENGLAND, ASSIGNOR TO HAYWARD TYLER &00., OF LONDON, ENGLAND.

JOINT PERMITTING OF INDEPENDENT ROTATION OF THE TWO PARTS.

SPECIFICATION forming part of Letters Patent N 0. 638,564, datedDecember 5, 1899.

Application filed July 1', 1899. Serial No. 722,590. (No model.)

To all whont it ind-y concern.-

Be it known that I, JAMES RICHARD DA- VIES, a subject of the Queen ofGreat Britain and Ireland, residing at Luton, in the county 5 ofBedford, England, have invented a certain new and useful Improved JointPermitting of Independent Rotation of the Two Parts, SpeciallyApplicable to a Valve and Its Spindle; and I do hereby declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to letters of reference marked theron, which form a part of thisspecification.

This invention relates to an improved joint permitting of independentrotation of the two parts; and it is, for example, specially applicableto the connection of a valve and its spindle.

According to this invention the end of one partsay the spindle-isprovided with an annular projection or ridge or with a number 2 5 ofsuch annular projections, and the other part-say the jumper or valve-isprovided with an annular recess or a number of such recesses, thediameter or diameters of which at the top is or are larger or smallerthan the 0 diameter or diameters at the bottom, or instead of providingthe end of the spindle with an annular ridge or a number of such ridgesand the jumper or valve with a corresponding recess or number ofrecesses the spindle may be recessed and the jumper or valve may havethe ridges thereon or the spindle may have a ridge or ridges and arecess or recesses, and the jumper or valve mayhave a recess or recessesand a ridge or ridges. The two parts 0 are forced together end to end,and, for example, the annular ridge on the onepart is forced into theannular recess in the other part, the result being that the ridge isdeformedthat is to say, its diameter when at the bottom of the grooveintended for its reception is expanded or contracted, all according tothe shape of the groove, and the two parts are held firmly together,while allowing of the free revolution of one part on the other;

and a particular feature of this invention consists therein that theparts may be made Without any undercuttingthat is to say, the

ridges and the grooves may be made in any ordinary lathe by one motionof the tool or cutter. If desired, spinning or squeezing of one or bothof the parts to be attached together may be resorted to in someconstructions in addition to the automatic deforma tion of the ridge orridges of the one part when it is or they are forced into the corre- 6osponding groove or grooves in the other part; but on the score ofsimplicity it is preferable to dispense with any such additionalspinning or squeezing.

Figure 1 of the accompanying sheet of drawings represents aValve-spindle, partly in elevation and partly in section, and a jumperor upper part of a valve in section before the two are connected. Fig. 2is a similar view and represents the two parts forced together; and Fig.3 is also an elevation, partly in section, showing an alternative construction. Fig. 4 is an elevation, partly in section, of a modifiedconstruction before the two parts are connected; and Fig. 5 isasimilarview of the said modified construction, showing the two parts connected.Fig. 6 represents yet another modification, in which the valve-spindleis partlyin elevation and partly in section. Fig. 7 is an elevation,partly in section, of an alternative construction, showing the partsbefore they are connected; and Fig. 8 shows them connected. Figs. 9, 10,and 11 are elevations, partly in section, of another modification,showing the parts respectively before connection when partly connectedand finally when entirely connected.

Referring to Figs. 1 and 2, one part-say the spindle A, Fig. 1-isprovided with an an nular projection or ridge G, and the other 0part-say the jumper D or the valve-is provided with an annular recess D,the innen wall of which forms a conical central stem E when the spindleA is brought near to the jumper D, valve, or other part to be connectedthereto. The annular rim G enters the recess D, and on forcing the twoparts together the cone E expands the rim Gr until the two parts arebrought as close together as possible, as shown in Fig. 2; but the partsare not so locked as to prevent of their revolution independently ofeach other.

The construction shown in Fig. 3 is very similar to that just described,except that the diameter of the groove D is smaller at the bottom thanat the top, and consequently the conical part E is greater in diameterabove than below. The diameter of the rim G is contracted as it entersthe groove D.

Referring to Figs. 4 and 5, it will be seen that one partsay, forexample, the spindle A of a valveis provided with a central recess B inits end face, and concentric therewith is a groove 0, of which the outerside is curved or slanting toward the center, and the other or innerside of the groove is straight or thereabout. The other partsay thejumper D of the valve-as shown, (or it may be the valve itself,) isprovided with a short central stem E, which is wholly or partly conical,and concentric to this stem is an annular projection or rim F, of whichthe sides are straight, or nearly so. Vhen the spindle A is brought nearto the jumper D, valve, or other part to be connected thereto, the shortstem E of the jumper enters the central recess l3, and on forcing thetwo together the aforesaid rim F is forced into the concentric recess 0in the spindle, while the annular rim G on the spindle formed by themetal between the central recess 13 and the concentric groove 0 isdisplaced by the coned part of the central stem E of the jumperD. Theresult obtained, as shown in Fig. 5, is that the rim F is decreased indiameter at the top and the rim G on the spindle is correspondinglyincreased. The two concentric rims therefore interlock; but the spindleA and the jumper D or other part are not locked, so as to prevent oftheir revolution independently of each other.

Fig. 6 represents a modification in which the spindle A is provided witha cone E and an annular rim F and the jumper D has a recess B and anannular rim G.

In Fig. 7 the one partsay, for example, the valve-spindle Ais providedwith a central recess B- in its end face, and concentric therewith is agroove 0, the sides of which are formed by the concentric rims G and H,and both these rims have their lower edges rounded off or chamfered. Thejumper or other part D is provided with a short central stem E, which iswholly or partly conical, and concentric to this stem is an annularprojection or rim F, of which the sides are straight, or nearly so, andthe top edges rounded 0E or chamfered. WVhen the spindle A is broughtnear to the jumper D, the short stem E of the jumper enters the centralrecess B, and on forcing the two parts together the aforesaid rim F isforced into the concentric recess 0 in the spindle, while the annularrim G on the spindle, formed by the metal between the central recess Band the concentric groove 0, is displaced by the coned part of thecentral stem of the part D. The result obtained, as shown in Fig. 8, isthat the rim F is decreased in diameter at the top, and the rims G and Hon the spindle are correspondingly increased at the bottom. Theconcentric rims therefore interlock; but the parts A and D are not solocked as to prevent of their revolution independently of each other.

Referring to Figs. 9, 10, and 11, one part say, for example, the spindleA of a valve is provided with a central recess B in its end face. Theother partsay the jumper Dof the valve, as shown, (or it may be valveitself,) is provided with a short central stem E,which is wholly orpartly conical, and concentric to this stem is an annular projection orrim F, of which the sides are straight, or nearly so. \Vhen the spindleA is brought near to the jumper D, valve, or other part to be connectedthereto, the short stem E of the valve enters the central recess B, andon forcing the two together the annular projection or rim G on thespindle, formed by the wall around the central recess B, is displaced bythe coned part of the central stem E of the jumper D. The resultobtained, as shown in Fig. 10, is that the rim G on the spindle isincreased in diameter to conform to the shape of the coned part E. Theouter rim F is, as shown in Fig. 11, then spun in or merely squeezed soas to conform to the contour of the inner rim G. The two concentric rimstherefore interlock; but the spindle A and the jumper D or other partare not locked, so as to prevent of their revolution independently of.each other.

As much bearing or steadying surface as is required may be arranged foroutside of the rims and grooves on the two parts, or one may dependpartially or wholly on the central stem or conical part and thecorresponding central recess for hearing or steadying surface. It isalso evident that it is not desired to limit ones self to the number ofgrooves and annular rims hereinbefore referred to and shown on thedrawings, as the construction may be varied in several respects withoutdeparting from the invention.

I claim 1. A joint permitting of independent rotation of the two partsthe one part having a central coned stem, an annular groove and anannular rim and the other part being provided with a central hole, anannular rim and an annular groove substantially as set forth.

2. A joint permitting of independent rotation of the two parts the onepart having a central coned stem and an annular rim and the other partbeing provided with a central hole and an annular groove or recesssubstantially as set forth.

3. A joint permitting of independent rotation of the two parts the onepart having a central coned stem an annular groove and an annular rimand the other part being provided with a central hole, an annular rim anannular groove and another annular rim substantially as set forth.

4. A joint permitting of independent rotation of the two parts the onepart having a central male coned stem, an annular groove and an annularrim and the other part havmy invention 1 have signed my name in the inga central hole an annular groove and two presence of two subscribingwitnesses. annular rims each groove being provided with one sloping andone straight side, said parts JAMES RICHARD DAVIES 5 being pressedtogether to interlock substan- Vitnesses:

tially as set forth. ELIOT HOWARD,

In testimony that I claim the foregoing as WALTER J. SKERTEN.

